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Finding the Third Proportional to 8,038.50 and 12,289

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Solution

The third proportional to 8,038.50 and 12,289 is: 18,787.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,038.50 : 12,289 = 12,289 : x
  2. Step 2: Convert to fraction form
    8,038.50/12,289 = 12,289/x
  3. Step 3: Cross multiply
    8,038.50x = 12,289 × 12,289
  4. Step 4: Simplify right side
    8,038.50x = 151,019,521
  5. Step 5: Solve for x
    x = 151,019,521/8,038.50
  6. Step 6: Final answer
    x = 18,787.03

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.